| 1101 | Davis Brothers O | | Oil Operator | Dec 1987 |
| 1102 | Davis Contract Pumping | | Oil Operator | Oct 2000 |
| 1103 | Davis Drilling & | | Oil Operator | Jul 1989 |
| 1104 | Davis Oil Compan | | Oil Operator | Jul 1988 |
| 1105 | Davis Operating Company | Elysian Field, TX 75642 | Oil & Gas Operator | Jun 2026 |
| 1106 | Davis Petroleum | | Oil & Gas Operator | Dec 1996 |
| 1107 | Davis Petroleum, Inc. | Great Bend, KS 67530 | Oil Operator | Aug 2021 |
| 1108 | Davis, Billy F. | Tulsa, OK 74152 | Oil Operator | Jun 1988 |
| 1109 | Davis, Michael G. | Wichita, KS 67212 | Oil & Gas Operator | Jul 1988 |
| 1110 | Davis, Robert E. | Graham, TX 76450 | Oil & Gas Operator | Apr 1997 |
| 1111 | Davis, Robert W. | Richfield, KS 67953 | Gas Operator | Dec 2010 |
| 1112 | Davis, William H. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2014 |
| 1113 | Dawson Resources Inc | Franktown, CO 80116 | Oil & Gas Operator | Mar 2015 |
| 1114 | Dawson-Markwell | | Oil & Gas Operator | Nov 1996 |
| 1115 | Dawson-Markwell Exploration Co. | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2026 |
| 1116 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | Jun 2026 |
| 1117 | Daystar Petroleum Inc | Eureka, KS 67045 | Oil & Gas Operator | Feb 2026 |
| 1118 | DB Energy, LLC | Baldwin City, KS 66006 | Oil Operator | Sep 2025 |
| 1119 | DBD Oil, LLC | Emporia, KS 66801 | Oil Operator | Feb 2026 |
| 1120 | DCF Exploration | Lakewood, CO 80215 | Oil Operator | Dec 1989 |
| 1121 | DCP Midstream, LP | Denver, CO 80237 | Oil Operator | Nov 2006 |
| 1122 | De & TZ LLC | Wellsville, KS 66092 | Oil Operator | Feb 2026 |
| 1123 | Dearinger Compan | | Oil Operator | Dec 1994 |
| 1124 | Decab Company | Victoria, KS 67671 | Oil Operator | Aug 1996 |
| 1125 | Dechant Oil Operations, LLC | Hutchinson, KS 67501 | Oil Operator | Dec 2025 |
| 1126 | Deck Oil Company | Tulsa, OK 74101 | Oil & Gas Operator | Jun 2020 |
| 1127 | Decker Lease Ope | | Oil Operator | Dec 1988 |
| 1128 | Decker Petroleum | | Oil & Gas Operator | Oct 2002 |
| 1129 | Deer Run Oil Lease, LLC | Caney, KS 67333 | Oil Operator | Feb 2026 |
| 1130 | Delaware Dyche Corp. | Hutchinson, KS 67501 | Oil Operator | Jan 2010 |
| 1131 | Delhi Gas Pipeli | | Gas Operator | Aug 1998 |
| 1132 | Delhi Pipeline | | Oil & Gas Operator | Sep 1999 |
| 1133 | Dell-Ray Investments, Inc. | Nickerson, KS 67561 | Oil Operator | Dec 2019 |
| 1134 | Delozier, Orval & Stevens, Floyd, A General Partnership | Dewey, OK 74029 | Oil Operator | Nov 2009 |
| 1135 | Delta Petroleum Company | Houston, TX 77267 | Oil Operator | Aug 1996 |
| 1136 | Delta Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 1137 | Deltex Petroleum | | Oil Operator | Nov 1994 |
| 1138 | Denchfield, Fred | Neal, KS 66863 | Oil Operator | Dec 1997 |
| 1139 | Denis Roberts Oil | | Oil Operator | Jan 2026 |
| 1140 | Denman J M Oil C | | Oil Operator | Mar 1994 |
| 1141 | Denmark Oil | Wichita, KS 67212 | Oil & Gas Operator | May 2000 |
| 1142 | Dennis Fitzpatrick Rev. Trust | Sterling, KS 67579 | Gas Operator | Feb 2026 |
| 1143 | Denny, Arthur Gene | Independence, KS 67301 | Oil Operator | Oct 1996 |
| 1144 | Denova | | Oil Operator | Jan 1989 |
| 1145 | Dernick Resources Inc | Dallas, TX 75204 | Oil & Gas Operator | Jan 2002 |
| 1146 | Derrick Petroleu | | Oil Operator | Sep 1994 |
| 1147 | Derrick Resources Inc | Henryetta, OK 74437-4249 | Oil & Gas Operator | Feb 2026 |
| 1148 | Derrick-Amer Oil | | Oil Operator | Dec 1991 |
| 1149 | Deshal Energy LLC | Oklahoma City, OK 73170 | Oil Operator | Nov 2025 |
| 1150 | Destiny Petroleum LLC | The Woodlands, TX 77381 | Oil & Gas Operator | May 2024 |
| 1151 | Destiny Services LLC | Pratt, KS 67124 | Oil & Gas Operator | Jan 2024 |
| 1152 | Deutsch Oil Comp | | Oil & Gas Operator | Oct 1994 |
| 1153 | Deutsch Oil Company | | Oil & Gas Operator | Feb 2026 |
| 1154 | Deutscher Oil Operations | | Oil Operator | Nov 2025 |
| 1155 | Development Ener | | Oil Operator | Dec 1994 |
| 1156 | Devon Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2009 |
| 1157 | Devon Energy Production Company, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2026 |
| 1158 | Devonian Oil Com | | Oil Operator | Dec 1996 |
| 1159 | Devonian Oil Company | Lawrence, KS 66044 | Oil Operator | May 2001 |
| 1160 | Dewayne'S Tank Service, Inc. | Saint John, KS 67576 | Oil Operator | Nov 2000 |
| 1161 | Dexxon Inc | Kiefer, OK 74041 | Oil & Gas Operator | Mar 2026 |
| 1162 | DGH Oil, LLC | Logan, KS 67646 | Oil Operator | Feb 2026 |
| 1163 | DHP Investments, LTD. | Tyler, TX 75703 | Oil Operator | Feb 2026 |
| 1164 | Diamond B Indust | | Oil Operator | Nov 1996 |
| 1165 | Diamond B Miami Flood, LTD. | Paola, KS 66071 | Oil Operator | Feb 2026 |
| 1166 | Diamond Chemical | | Oil & Gas Operator | Jan 1995 |
| 1167 | Diamond Dixie Ex | | Oil Operator | Jul 1985 |
| 1168 | Diamond Star Oil, Inc. | Lacygne, KS 66040 | Oil Operator | Dec 2019 |
| 1169 | Diehl Glenn D Oi | | Oil Operator | Jul 1993 |
| 1170 | Diehl Oil Inc | Hays, KS 67601 | Oil Operator | Feb 2026 |
| 1171 | Dieter Prod Comp | | Oil & Gas Operator | Feb 1991 |
| 1172 | Dieter Production Company | Durham, KS 67438 | Gas Operator | Mar 2013 |
| 1173 | Dietrich Oil Co., A General Partnership | Humboldt, KS 66748 | Oil Operator | Jul 2000 |
| 1174 | Dilley, W.R. & A'Meta I. | Sedan, KS 67361 | Oil Operator | Nov 2015 |
| 1175 | Dimick Production, LLC | Hamilton, KS 66853 | Oil Operator | Jan 2026 |
| 1176 | Directional Drilling Systems, LLC | Greenwood VIllage, CO 80111 | Oil Operator | Dec 2019 |
| 1177 | Discovery Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2026 |
| 1178 | Diversified Operating Corp. | Golden, CO 80401 | Oil & Gas Operator | Oct 2012 |
| 1179 | Dixie Oil Incorp | | Oil Operator | Jul 1992 |
| 1180 | Dixie Oil, LLC | Hamilton, KS 66853 | Oil Operator | Nov 2025 |
| 1181 | Dixon Energy, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Sep 2023 |
| 1182 | Dixon Oil Compan | | Oil Operator | Apr 1994 |
| 1183 | Dixon Operating Company, LLC | Wichita, KS 67206 | Oil & Gas Operator | Feb 2026 |
| 1184 | Dixon, Margaret | Moline, KS 67353 | Oil Operator | Dec 2009 |
| 1185 | Dixon, Mike | Moline, KS 67353 | Oil Operator | Jan 2026 |
| 1186 | Dixon, Robin Francine | Moline, KS 67353 | Oil Operator | Feb 2026 |
| 1187 | DK Operating Inc. | Jetmore, KS 67854 | Oil Operator | Feb 2026 |
| 1188 | DKM Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2011 |
| 1189 | DLB Oil & Gas, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Jun 2026 |
| 1190 | DLM Oil | | Oil Operator | Nov 2008 |
| 1191 | DMH Petroleum, Inc. | Sterling, KS 67579 | Oil Operator | Feb 2026 |
| 1192 | DMS Oil Company | Houston, TX 77042 | Oil & Gas Operator | Mar 2026 |
| 1193 | DNB Drilling, Inc. | Wichita, KS 67208 | Oil & Gas Operator | Jan 2001 |
| 1194 | DNR Oil And Gas, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Apr 2026 |
| 1195 | Dobrinski, Mark E., A General Partnership | Coldwater, KS 67029 | Oil Operator | Feb 2008 |
| 1196 | Docking Developm | | Oil & Gas Operator | Dec 1996 |
| 1197 | Docking Development Company, LLC | Arkansas City, KS 67005 | Oil & Gas Operator | Oct 2013 |
| 1198 | Dolphin Energy LLC | Lake Worth, FL 33467 | Oil & Gas Operator | Feb 2026 |
| 1199 | Domar Oil & Gas | | Gas Operator | May 1995 |
| 1200 | Domar Oil & Gas Inc | Liberal, KS 67905 | Oil & Gas Operator | Oct 2000 |